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Pregled bibliografske jedinice broj: 140231

Evolution of Istrian Part of the Adriatic Carbonate Platform from the Middle Jurassic to the Santonian and Formation of the Flysch Basin During the Eocene: Main Events and Regional Comparison


Velić, Ivo; Tišljar, Josip; Vlahović, Igor; Matičec, Dubravko; Bergant, Stanislav
Evolution of Istrian Part of the Adriatic Carbonate Platform from the Middle Jurassic to the Santonian and Formation of the Flysch Basin During the Eocene: Main Events and Regional Comparison // Field trip guidebook : evolution of depositional environments from the palaeozoic to the quaternary in the Karst Dinarides and the Pannonian Basin / 22nd IAS Meeting of Sedimentology / Vlahović, Igor ; Tišljar, Josip (ur.).
Zagreb: Institute of Geology, 2003. str. 3-18 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


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Naslov
Evolution of Istrian Part of the Adriatic Carbonate Platform from the Middle Jurassic to the Santonian and Formation of the Flysch Basin During the Eocene: Main Events and Regional Comparison

Autori
Velić, Ivo ; Tišljar, Josip ; Vlahović, Igor ; Matičec, Dubravko ; Bergant, Stanislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Field trip guidebook : evolution of depositional environments from the palaeozoic to the quaternary in the Karst Dinarides and the Pannonian Basin / 22nd IAS Meeting of Sedimentology / Vlahović, Igor ; Tišljar, Josip - Zagreb : Institute of Geology, 2003, 3-18

Skup
22nd IAS Meeting of Sedimentology

Mjesto i datum
Opatija, Republika Hrvatska, 17.-19.09.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Geology of Istria; Adriatic carbonate platform; peritidal carbonates; emersions; Upper Jurassic; Cretaceous; Eocene; Flysch; Croatia

Sažetak
Istria belongs to the NW part of the ancient Adriatic Carbonate Platform (AdCP), which represented a part of the so-called Mediterannean Seuill (DERCOURT et al., 1993), dividing during the Mesozoic Tethyan realm into the western and eastern part. Due to the complex geological history of the platform area, especially significant post-depositional tectonics, among Croatian geologists there are different opinions concerning two important issues: its name and stratigraphic range. Concerning the second issue, the stratigraphic range of the Adriatic Carbonate Platform as autonomous entity, the most important point is to define this huge carbonate body to be palaeogeographically recognisable. Although the Outer Dinarides comprise carbonate deposits of wider stratigraphic range (from Carboniferous to Eocene), only a part of this succession belongs to the Adriatic Carbonate Platform sensu stricto, i.e. to the spatially defined isolated shallow water platform. In conclusion, we would like to emphasize the importance of making a clear terminological distinction between the carbonate platform and the product of its disintegration. Therefore disintegration of the Adriatic Carbonate Platform and neighbouring areas, which culminated in Oligocene-Miocene, resulted in formation of the Dinarides mountain belt. The stratigraphic range of the AdCP sensu stricto, i.e. completely isolated carbonate platform, might be defined from the Late Liassic to the end Cretaceous. Istrian succession consists predominantly of carbonate rocks ranging in age from the Late Dogger to the Eocene, with subordinate Eocene siliciclastic rocks, flysch and calcareous breccia. According to the results of investigations, the Istrian succession can be divided into four sedimentary units or large-scale sequences of carbonate deposits bounded by important discontinuities - emersion surfaces representing different durations, as well as a cover of Quaternary deposits. The following large-scale sequences have been distinguished: 1)Bathonian - lowermost Kimmeridgian ; 2)Upper Tithonian - Lower/Upper Aptian ; 3)Upper Albian - Upper Santonian ; 4)Eocene ; 5) Quaternary. Bathonian-lowermost Kimmeridgian regressive large-scale sequence is mainly characterised by a shallowing-, and coarsening-upward trend, which in the uppermost part is expressed by the appearance of a regressive breccia (Rovinj breccia - VELIĆ & TIŠLJAR, 1988), and a final emergence surface with bauxite deposits. Upper Tithonian - Lower/Upper Aptian transgressive-regressive large-scale sequence is very complex, especially with regard to its facies heterogeneity and great thickness. From the lithological point of view, different types of peritidal deposits predominate, especially pelletal limestones and LLH-stromatolites, with subordinate emersional breccia with clayey matrix (Tithonian, Hauterivian, Barremian), early- and late-diagenetic dolomites (Berriasian), and grainstones (bioclastic sand bar deposits in the Upper Valanginian and Upper Barremian). Deposits of this large-scale sequence crop out from Poreč, in the form of an arc, near Kanfanar and Bale to the coast from Rovinj to the island of Veli Brijun. Upper Albian - Upper Santonian transgressive-regressive large-scale sequence is very thick with a very variable facies succession. After extensive emersion during the late Aptian and early Albian, at first gradual, and later complete ingression occurred during the middle of the Albian, i.e. it was accomplished by the beginning of the late Albian. Thus the shallow-water platform carbonate system was re-established in the whole of the Adriatic Carbonate Platform that today belongs to Istria. However, several larger sedimentary units can be separated, each characterised by relatively similar sedimentary conditions and environments. These are: a)the peritidal and foreshore sedimentary system during the Albian ; b)differentiation of sedimentary systems during the Vraconian and Cenomanian ; c)the drowned platform system during the youngest Cenomanian and early Turonian ; d)the shallow-water sedimentary system during late Turonian, Coniacian and Santonian. Fourth large-scale sequence in Istria comprises a relatively thick succession of carbonate and siliciclastic rocks. Its greatest part crops out in the area of the Pazin Basin and neighbouring areas. The duration of the emersion phase between the Early to Late Cretaceous and Early Eocene is variable from area to area. Different members of the Eocene succession were transgressively deposited on different members of the Cretaceous basement, according to the differentiation caused by the Late Cretaceous tectonic phas. Consequently, the succession of the Eocene deposits is very variable in the lateral and vertical sense, especially concerning changed conditions in Palaeogene marine environments. In general, the deposits can be divided into the so-called Liburnian deposits, Foraminiferal Limestones, Transitional beds and Flysch.

Izvorni jezik
Engleski

Znanstvena područja
Geologija



POVEZANOST RADA


Projekti:
0181001
0195034
0181009

Ustanove:
Hrvatski geološki institut,
Rudarsko-geološko-naftni fakultet, Zagreb

Citiraj ovu publikaciju

Velić, Ivo; Tišljar, Josip; Vlahović, Igor; Matičec, Dubravko; Bergant, Stanislav
Evolution of Istrian Part of the Adriatic Carbonate Platform from the Middle Jurassic to the Santonian and Formation of the Flysch Basin During the Eocene: Main Events and Regional Comparison // Field trip guidebook : evolution of depositional environments from the palaeozoic to the quaternary in the Karst Dinarides and the Pannonian Basin / 22nd IAS Meeting of Sedimentology / Vlahović, Igor ; Tišljar, Josip (ur.).
Zagreb: Institute of Geology, 2003. str. 3-18 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
Velić, I., Tišljar, J., Vlahović, I., Matičec, D. & Bergant, S. (2003) Evolution of Istrian Part of the Adriatic Carbonate Platform from the Middle Jurassic to the Santonian and Formation of the Flysch Basin During the Eocene: Main Events and Regional Comparison. U: Vlahović, I. & Tišljar, J. (ur.)Field trip guidebook : evolution of depositional environments from the palaeozoic to the quaternary in the Karst Dinarides and the Pannonian Basin / 22nd IAS Meeting of Sedimentology.
@article{article, year = {2003}, pages = {3-18}, keywords = {Geology of Istria, Adriatic carbonate platform, peritidal carbonates, emersions, Upper Jurassic, Cretaceous, Eocene, Flysch, Croatia}, title = {Evolution of Istrian Part of the Adriatic Carbonate Platform from the Middle Jurassic to the Santonian and Formation of the Flysch Basin During the Eocene: Main Events and Regional Comparison}, keyword = {Geology of Istria, Adriatic carbonate platform, peritidal carbonates, emersions, Upper Jurassic, Cretaceous, Eocene, Flysch, Croatia}, publisher = {Institute of Geology}, publisherplace = {Opatija, Republika Hrvatska} }




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